I have zero experience with electrical engineering and am hoping that someone can a) tell me if this is possible, and b) direct me to some material where I can learn enough about this to ask intelligent questions. I can't find anything on a hobbyist level and am not looking for college level courses.

I have a small water pump https://www.amazon.com/gp/product/B07SJGKFT7/ref=ppx_yo_dt_b_asin_title_o07_s01?ie=UTF8&psc=1

It is a 3W submursible pump that plugs into the wall. I want to add an LED so that when it is plugged in and running, an LED lights up as well. The LED needs to be waterproof. I plan to use this to make an illuminated tabletop fountain.

Is this a thing that is possible, and if so where can I begin to learn about this? All I can find are college level engineering courses, and I don't even know if this is a thing that can be done.

Sorry if I sound really stupid, this is outside my area of expertise and Google has been no help.

  • 1
    \$\begingroup\$ Adding a light to a watertight pump will be difficult. Why not just have a separate light. amazon.com/LemonBest-Underwater-Spotlight-Fountain-Landscape/dp/… \$\endgroup\$ – Mattman944 Jan 12 at 2:35
  • \$\begingroup\$ I know I could add a separate light and a separate plug. My question is, is it possible to do what I described, and where can I learn more about this? \$\endgroup\$ – user1483042 Jan 12 at 2:55
  • \$\begingroup\$ Instead of "engineering" in your search terms, try "DIY". As in "DIY underwater LED". See if that helps. \$\endgroup\$ – TimWescott Jan 12 at 3:07
  • \$\begingroup\$ Thanks. Will do. \$\endgroup\$ – user1483042 Jan 12 at 3:16
  • \$\begingroup\$ #user1483042, Welcome and nice to meet you. Ah let me see. Adding a water proof status LED with your mains 110/220VAC waterproof pump is hobbyist easy, and there are a couple of ways to do it. I am assuming you don't want to do fancy things using complicated hardware like Arduino. Please let me know otherwise. \$\endgroup\$ – tlfong01 Jan 12 at 3:31


How to DIY a waterproof LED lamp?


There are expensive water proof lamps, but if you are a poor hobbyist like me, and have minimum DIY skills, you can buy a cheap, low voltage (DC 5V) low power (0.2W), USB LED lamp (Ref 1 below), and make it "waterproof", using perhaps heat shrink tube or similar goodies.

Or if you are poor and lazy like me, you can just do the following:

usb led lamp 1

usb led lamp 2

usb led lamp 3

No Guarantees

1. No guarantee it won't work for too many years.

2. No guarantee it won't melt down, blow up, or electrocute your fish.


(1) AliExpress USB LED Lamp Night Lamp


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